Hi Alexander,
Do you have a kernel and ramdisk and kernel command line that works on your board?
Yes, i have a working 3.0. kernel and ramdisk.img it is an android image.
Linux version 3.0.15 (root@yicsystem) (gcc version 4.4.3 (GCC) ) #1 SMP PREEMPT Thu Apr 25 14:28:59 KST 2013
kernel command line
# cat /proc/cmdline console=ttySAC1,115200n8 vmalloc=512M androidboot.console=ttySAC1
i built a kernel with same string.
Ok, good.
Also is U-Boot and the kernel mainline?
u-boot based on U-Boot 2012.12-00000-g462762b-dirty with yse5250 platform changes
And i tried a mainline u-boot and it's does not working. Just an empty screen on terminal window.
This is of course unfortunate as we are then not able to _really_ infer what is going on on your board. Potentially, there can be a lot of changes in such modified versions.
Cheers Detlev